Experimental reconstruction of the Berry curvature in a Floquet Bloch band

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• Christof Weitenberg (Universitat Hamburg)
• Monday 25 April 2016, 15:30-17:00
• Ryle Seminar (Rutherford 930).

If you have a question about this talk, please contact pjh65.

Topological properties lie at the heart of many fascinating phenomena in solid state systems such as quantum Hall systems or Chern insulators. The topology of the bands can be captured by the distribution of Berry curvature, which describes the geometry of the eigenstates across the Brillouin zone. Employing fermionic ultracold atoms in a hexagonal optical lattice, we engineer the Berry curvature of the Bloch bands using resonant driving and show a full momentum-resolved measurement of the ensuing Berry curvature. Our results pave the way to explore intriguing phases of matter with interactions in topological band structures.

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